a single dose of either Pfizer-BioNTech or AstraZeneca vaccines gave a 38-49 percent lower probability of transmitting the virus to their households compared to those who did not receive the vaccine dose.
Public health in England analyzed more than 57,000 contacts from 24,000 households in which a person who received a dose of the vaccine tested the virus positive and compared it to nearly a million cases among unvaccinated people.
“We have shown that both vaccines are associated with a 40–50% reduced likelihood of infecting households from individuals diagnosed with COVID-19 after vaccination, highlighting important broader benefits for close contact,” the study concluded.
“These results may have implications for infectivity in other contexts with similar infection risks. These need to be taken into account in future pandemic modeling so that the effects of the vaccination program can be fully considered and public health strategies and public communication communicated in the future,” added.
Hill said cases of household contact were considered secondary if they received a positive COVID-19 test 2-14 days after the initial case.
The researchers found that protection was present approximately 14 days after vaccination and remained stable despite the different ages of cases or contacts. In addition to the 60-65% reduced risk, the measured protection is the development of symptomatic COVID-19 in the vaccinated individual four weeks after a single dose.
The researchers said the results would likely be similar in other high-risk transfer locations in addition to households, such as shared accommodation and prisons.
British Minister for Health Matt Hancock called the study “great news” and said, “We already know that vaccines save lives, and this study is the most comprehensive real-world data that shows that they also reduce the spread of this deadly virus.”
“It further confirms that vaccines are the best way to get out of this pandemic because they protect you and can prevent you from unknowingly infecting someone in your household,” he added in a statement quoted by The Hill.
But Mary Ramsay.
Vaccine recipients can still test positive for COVID-19, even after a complete vaccination, because vaccines are not 100% effective. However, vaccines have been shown to reduce the risk of serious illness and death with COVID-19.
At the same time, Pfizer and Moderna vaccines were 94 percent effective in preventing hospitalization for COVID-19 in people 65 years of age and older, according to a study by the U.S. Center for Disease Control and Prevention (CDC) published Wednesday.
The study provides new evidence on the benefits of vaccinations and is based on the results of clinical trials, adding real evidence from 417 hospitalized adults in 14 states from January to March.
“This multi-site assessment in the United States under real conditions suggests that vaccinations provided protection against COVID-19 hospitalization in older adults. [65 and older]”, the study finds.
In the United States, as more people are vaccinated, COVID-19 deaths have dropped significantly, from a January high of more than 3,000 a day, to about 650 a day today, according to CDC data.
Source: ANI
Source: The Nordic Page